Aria Tadbir Page company,  considering its mission in the field of optimization and choosing the best construction system, is always trying to use the latest technologies in the world and is ready to cooperate with respected employers.

The new technologies that this company is currently capable of designing and implementing are as follows:

  •  Construction system of cold-rolled light steel frames LSF,  construction method of reinforced concrete buildings, load-bearing wall with permanent insulation mold, ICF  , Cobiax roof system,  pre-tensioned hollow core slabs, construction system of cold-rolled steel frames, CFS 
  •  LSF cold rolled steel light frame building systemLight weight steel frame buildings known as LSF are used as dry construction and mainly using screw connections and industrial production method. These buildings consist of three main components, including cold-rolled steel sheets to provide the structure, plasterboard plates as the inner layer of heat and sound insulation. The use of these buildings as an independent structural system, mostly in the accumulation of two-story buildings. , offices and small commercial buildings, industrial units and sports halls are on the same floor. It seems that this structural system can be combined with structural systems. Another, like reinforced concrete walls, it also has a structure and can be used in the construction of short-story buildings as a mixed structural system. For the construction of cold-rolled sections, according to the regulations related to these structures, the use of different shapes is allowed. These sections usually have various dimensions and a range of thickness variations between 0.6 and 2.5 mm. The LSF structure is connected to the foundation by a horizontal coil with a cross section. The vertical components of this system act as column-bearing members under gravity loads. Some of these members, which are placed in the opening of the lateral bracing of the structure, in addition to the gravity load, bear the forces caused by lateral loads. These members are called studs. are introduced in this system. The roof structure of these buildings consists of cold-rolled metal beams, the distances of the beams are adjusted according to the capacity The member load and the dimensions of the roof covering parts, which can be wooden boards, cement or reinforced concrete slabs, are determined. Beams and beams mainly have sections with c or z shapes, roof covering with reinforced concrete slab, if the necessary integration between the concrete and the steel profile of the beam is provided. , can be designed as a metal concrete composite roof. In LSF buildings, in order to carry the lateral load of the structure in two main orthogonal stretches, from the openings Lateral bearing is used, which is called (Load Bearing Wall). Bearing openings are created in 4 ways, which are: system of braced openings with diagonal members, shear wall system with thin steel sheet, load bearing wall system with OSB covers, Reinforced concrete shear wall system. Currently, in Iran, the use of braced openings with diagonal members for buildings up to 2 residential floors and the lateral bearing system of reinforced concrete shear wall It is allowed for buildings up to 5 floors. The acoustic performance of the walls and ceilings made with this system, if the necessary measures are followed, can easily meet the expectations set in the national building regulations. Cold rolled profiles have little fire resistance and must be well protected. One of the reasons for using plaster as the interior coating of buildings is to achieve this goal. One of the main advantages of LSF steel buildings is the reduction of the mass of the building, which will have a great impact on reducing the costs of materials, manpower, and the construction time of projects. It is possible to use this system in five-story buildings in the country by observing certain measures and to It seems that it can be successful as an option in mass production, provided that based on its structural performance, design and implementation, the limitations and criteria in other regulations are reviewed and for The country should be compiled and prepared.Undoubtedly, corrections are needed regarding the column sections, diagonal members of the brace and also the connections of this system, which should be properly addressed. This system has been evaluated in the fields of energy, fire, acoustics and structure at the building and housing research center, and its use is allowed within the scope of the requirements. Performance design requirements for LSF cold-rolled light steel frame building systems
    1. In areas with low, medium and high relative risk (according to Iran’s 2800 regulations), the use of this structural system as a simple building frame with a reinforced concrete shear wall at a maximum of 5 floors or a height of 18 meters from the base level is unimpeded. The system is unobstructed in areas with low, medium and high relative risk (according to Iran’s 2800 regulations) up to a maximum of 2 floors or a height of 7.20 meters from the base level, with the implementation of diagonal bracing. The use of this system in seismic areas with relative risk Very high (according to Iran’s 2800 regulations) is not allowed. The use of a maximum opening of 5 meters and a maximum gross height of 3.60 meters (including the thickness of the roof) is allowed for each floor in this system. The design of all components of the connections in this system is based on The basis of the AISI standard and its structural and seismic design should be carried out based on the ASCE-05 and IBC2003 regulations and subsequent editions. Structure control against wind load based on the national building regulations of Iran, the sixth topic And it should be done by taking into account the system resistant to the lateral load caused by the earthquake that is mentioned in clauses 1 and 2. It is mandatory to observe the maximum dead and live load limits of 250 kg/m2 and 350 kg/m2 respectively for roofs. It is mandatory to comply with the specifications of cold rolled steel according to the ASTM standard. It is mandatory to comply with the provisions of Chapter 21 of the ACI-318-05 regulation and subsequent revisions for the design of reinforced concrete shear walls. Rigid diaphragm is required for all roofs. All connections of vertical members to horizontal members must be in such a way that the integrity of the members is ensured at the height of the structure. The regulations related to the connection components including self-tapping screws, screws and nuts must be provided according to AISC regulations and AISI standards. If welding joints are used, it is mandatory to comply with the rules and regulations related to the welding of rolled members according to the AISI standard and AWS and AISC regulations. This system consists of a metal beam of an upper reinforced concrete slab in the form of a composite section, which must be provided based on the criteria of composite sections according to the regulations and reinforced concrete slabs based on the ACI regulations. The use of building materials in the external and internal walls is not allowed. The maximum weight The square meter of the finished wall in internal separators should not be more than 50 kg/m2 and in external walls it should not be more than 100 kg/m2. Non-load-bearing panels and separators should be made in the lateral stiffness of the structure. It is necessary to make the necessary arrangements according to the different climatic conditions and corrosive environments of Iran. All materials and components in this system, both architectural and structural, in terms of durability, corrosion, environment, etc. It should be applied based on Iran’s national building regulations or recognized and approved national or international regulations. The requirements related to energy should be in accordance with topic 19 of regulations National building must be observed. 20. If the thermal insulation is implemented as a filler, the type and thickness of the insulation must provide the required thermal resistance. In order to reduce the effect of the thermal bridge, it is necessary to fill the interface between the studs and the outer layer of the wall with a type of dense thermal insulation. It is necessary to take full consideration of air sealing in internal and external walls, openings, as well as the place of installation of connecting components such as bolts and nuts, according to the desired climate and also the risk of condensation.Compliance with the third section of the National Building Regulations regarding the protection of buildings against fire, as well as the requirements of Publication No. 444 of the Building and Housing Research Center regarding the fire resistance of walls, taking into account the dimensions of the building, the use and the functional function of the building components, is mandatory. Soundproofing of the air gap of the separators between independent units and the outer shell of the building and soundproofing of the ceiling between floors must be provided in accordance with the eighteenth section of the National Building Regulations. Obtaining a technical certificate for the manufactured product, after launching the factory production line, is mandatory from the Building and Housing Research Center.
     Prefabricated lightweight non-load-bearing walls LSF lightweight wall panels that are branched from the construction system of cold rolled light frames can be used in most construction systems. These wall panels are formed based on the use of components called studs and tracks, and the main structure of the walls is made of The combination of cold-rolled galvanized steel profiles is established. The section used in these walls is c-shaped, which is usually connected with mechanical connections. They connect to each other. Each wall consists of a number of vertical components (forced) at intervals of 40 to 60 cm, which are connected at the top and bottom to the horizontal components of U-shaped or C-shaped studs (beams). If C-shaped sections are used as beams, it is necessary Cutting work should be done at the installation site of the spacers. This system has a high ability to install thermal insulation. Thermal insulation can be installed between spacers in two ways. In the first method, spacers They are executed in the same direction and the thermal insulation is placed in the space between them. In the second method, the conductors are not executed in the same direction and the thermal insulation moves in a zigzag pattern between them. In this case, the conductors will not act as polythermal insulation and Better conditions are achieved. Another way to insulate the walls is to install a rigid thermal layer on the outer side of the metal frame. Sound insulation is done by adding plasterboard or cement on both sides of the insulation. thermal insulation (glass wool) is provided. Other methods of creating sound insulation in one floor are the use of separating walls with two separate frames and the use of acoustic barriers. Relatively thin sheets of galvanized steel have little resistance to fire and are This opinion must be protected, otherwise LSF type structures against fire will quickly undergo deformation and collapse. Protecting these structures against fire by means of boards Gypsum that is installed on a steel frame can be provided. In general, due to the significant reduction in weight and little loss of materials compared to conventional methods and the adaptability of this system to the national building regulations, the use of this type of non-load-bearing light internal walls for mass These panels have been evaluated in the fields of energy, fire, acoustics, and structure at the building and housing research center, and their use is allowed within the scope of the requirements. Design and implementation requirements for prefabricated lightweight non-load bearing wall systems
  • LSF1, it is necessary to consider the necessary arrangements for not participating these panels in the lateral stiffness of the structure. 2.
  • The design of external panels and related connections against wind load should be carried out according to the national regulations of Iran, the sixth topic
  • 3. The maximum net height allowed for the panels is 3.2 meters
  • 4 The maximum weight of external panels is limited to 100 kg/m2 and internal panels to 50 kg/m2.
  •  
    1. It is mandatory to comply with the specifications of cold rolled steel according to the ASTM standard. The regulations related to the connection components including self-tapping screws, bolts and nuts must be provided according to the AISC regulations and the AISI standard. It is required according to the AISI standard and the regulations of AISC and AWS. It is necessary to make appropriate arrangements for different climatic conditions and corrosive environments of Iran. 9. The requirements related to energy must be complied with according to topic 19 of the national building regulations.
    10. If the thermal insulation is implemented as a filler, the type and thickness of the insulation must provide the required thermal resistance. 11. In order to reduce the effect of the thermal bridge, it is necessary to fill the gap between the spacers and the outer layer of the wall with a type of dense thermal insulation.
  • 12. It is necessary to take full consideration of air tightness in internal and external walls, openings, as well as the installation location of connecting components such as bolts and nuts, considering the intended climate and the risk of condensation.
  • 13 It is mandatory to comply with the third topic of our strict national regulations regarding the protection of buildings against fire, as well as the requirements of the publication number 444 of the Building and Housing Research Center regarding the resistance of walls against fire, taking into account the dimensions of the building, the use and the functional task of the building components.
  • 14. The ventilation of the separators between the independent units and the external shell of the building and the soundproofing of the roof between the floors should be provided according to the 18th topic of the national building regulations.
  • 15 All materials and components in this system, including architecture and structure, in terms of durability, corrosion, environment, etc., should be used based on Iran’s national building regulations or recognized and approved national or international regulations. .
  • 16 Obtaining a technical certificate for the manufactured product, after starting the production line of the factory, from the building and housing research center

 The implementation method of reinforced concrete buildings bearing walls with permanent ICF insulation formwork

This system is a method of building a reinforced concrete building in situ with permanent polystyrene insulation molds, and the resulting structure is a reinforced concrete building and is considered among the common structures. In this building system, the wall and ceiling molds are made using galvanized iron wire. Diameter 2.2 mm, welded in the form of a grid, made in the factory and on the inner and outer sides of the mold, panels of insulating materials such as slow-burning expanded polystyrene are placed. concrete wall forms with the possibility of reinforcement as required and with the thickness desired by the designer from 80 to 500 mm and more for walls and roof forms, in the form of one or two-sided slab beam with variable depth and spacing of beams and desired, can be produced by production lines on a relatively large scale. The factory production line of this system can produce the necessary modules for the construction of residential units. The factory modules of this system are light and can It has fast transportation and installation in execution, so that it can implement more than 20 square meters per person-day. The relatively considerable thickness of finished architectural walls can be considered as one of the limitations of this system.

Requirements for the implementation method of reinforced concrete buildings bearing walls with permanent insulation formwork

  1. The use of this method can be used to build concrete shear load-bearing walls.
  2. The gravity and seismic loading of the structural system resulting from this implementation method should be observed according to the latest editions of the sixth topic of the National Building Regulations and the 2800 standard.
  3. In the design and construction of shear walls, it is necessary to comply with all the requirements and regulations contained in the Iranian Standard 2800 (Design Code of Buildings Against Earthquake), the Concrete Code of Iran (ABA) and the important topics of the national building regulations.
  4. Any restrictions on the use of this system should be observed according to the geometrical specifications and rebar of the walls and the specifications of the materials according to the above references.
  5. At least the thickness of concrete walls should not be less than 15 cm.
  6. The specifications of all consumables related to the formatting components of the document must be in accordance with valid international standards and the documents provided.
  7. The specifications of other consumables must be in accordance with national or valid international standards and regulations.
  8. Expandable polystyrene must be slow-burning in accordance with ASTM or other international standards.
  9. Polystyrene should be protected with sufficient thickness of suitable coatings according to internal and external conditions.
  10. Compliance with the third topic of our strict national regulations regarding the protection of buildings against fire, as well as the requirements of the publication number 444 of the Building and Housing Research Center regarding the resistance of walls against fire, taking into account the dimensions of the building, the use and the functional task of the building components, is mandatory.

11. The soundproofing of the air-borne separators between independent units and the outer shell of the building and the soundproofing of the roof between the floors should be provided according to the 18th topic of the National Building Regulations.

12. Energy requirements must be met in accordance with Section 19 of the National Building Regulations.

13. It is necessary to make appropriate preparations for different climatic conditions and corrosive environments of Iran

14. It is mandatory to obtain a technical certificate for the manufactured product from the building and housing research center after starting the factory production line.

15. Provide suitable mortar coating for steel wires in the inner and outer body.

  •  Cobiax roof systemDue to the need to control deformations and cracks, reinforced concrete roofs are of great interest and sometimes limited to small openings. Now, if it is possible to improve the cross-section of reinforced concrete roofs, especially the slabs, in such a way that, in addition to meeting the control criteria, they have less weight compared to similar slabs, a new method can be achieved in the implementation of reinforced concrete slabs. Although there is usually no problem in two-sided concrete slabs in terms of bearing shear force, the design principles of this type of roof are based on removing a part of the middle concrete and performing the function of a two-sided slab in such a way that a A concrete slab containing holes caused by the presence of hollow spherical balls should be provided. Cubiax reinforced concrete hollow roofs consist of two layers of reinforced concrete, which are widely placed at the top and bottom of the slab, and the distance between these two layers is filled with spherical balls. It is filled with propylene material, which has different dimensions according to the needs of the project and design calculations. Shelves of spherical spheres are placed on the lower reinforcement grid with side-by-side intervals, and after the reinforcement of the upper layer, concrete is poured. Finally, the cross-section of the slab is I-shaped with variable thickness. This type of roof in The fields of structure, energy, fire and acoustics have been investigated in the building and housing research center and its application is approved in the scope of the formulated requirements. Design and implementation requirements for the Kubiax roof system 1. The use of this type of roof is allowed under the condition of compliance with the criteria and restrictions mentioned below and the sixth and ninth sections of the National Building Regulations, in reinforced concrete shear wall buildings. 2. These criteria are only for Kubiax roofs. It is used with spherical balls and does not include roofs or balls with non-spherical shapes. 3. The total dead load on these roofs, including partitions, flooring and joinery, is limited to 260 kilos. grams per square meter, and the use of this type of roof is only allowed for parking lots where passenger cars with a maximum weight of 2.5 tons with a concentrated load of 1 ton can pass. Between two consecutive spheres, at least 5 cm should be considered. 5. In the design, the shear capacity of the steel used in the shelf of the spheres should be ignored, however, the amount of steel with vertical extension in this shelf should be according to paragraph 1-9-12-6-3-1 National Building Regulations of Iran should be provided with the minimum distance between two consecutive spheres in each direction of the slab. 6. In the design for cutting in each direction of the slab, the final shear strength of concrete should be at most 50% of the value The calculation should be calculated according to the relation 9-12-4 of the ninth topic of the National Building Regulations and assuming a full concrete cross-section. In all points of the slab where the final shear force is greater than the final shear strength provided by the concrete, the slab should be solid and without spheres. to be 7. In the design and control of cutting in the final limit state for two-way operation around concentrated loads and supports, the final shear strength of concrete should not be more than 50% of the limit specified in paragraph 9-12-17-2-4 of the ninth topic of the National Building Regulations 8. The design of the slab for bending in any direction according to the implementation details, or the design of holes with a circular section, should be done in the weakest section of the slab.9. Slab deformation calculations based on paragraph 1-9-14-2-6-1 of the ninth topic of the National Building Regulations and with accurate calculation of the effective moment of inertia of the perforated slab. Additional long-term sagging based on paragraph 9-14-2-4 3- The ninth topic of the National Building Regulations should be calculated. 10. The creation of any opening in this slab is subject to the provisions of Section 9-15-3-5 of the ninth topic of the National Building Regulations. 11. At the intersection of the shear wall and Kubiax slab, the transfer of shear caused by an earthquake from the slab to the wall should be controlled at the weakest cross-section of the wall, and if necessary, steeling should be used to facilitate the transfer of shear within the diaphragm plane to the wall. 12. Prediction of boundary elements around the openings and The edge of the slab should be done according to the design criteria of existing regulations and regulations. 13. The maximum opening (column center to column center) for this type of roof in the form of a flat slab is limited to 6.5 meters. If this type of roof is used in combinations with a reinforced concrete bending frame including separate beams and columns that are designed separately from the slab. The aforementioned limit for the opening of the slab increases to 8 meters. 14. The use of the pre-slab method is allowed only when the rack and balls are involved in the pre-slab and tensile steels are provided in the pre-slab.
    1. . It is mandatory to obtain a technical certificate for the manufactured product from the building and housing research center after starting the factory production line.
    2. It is mandatory to comply with the third topic of our strict national regulations regarding the protection of buildings against fire, as well as the requirements of the Building and Housing Research Center’s publication number 444 regarding the resistance of walls against fire, taking into account the dimensions of the building, the use and the functional task of the building components.
    3. Soundproofing of air-borne separators between independent units and the outer shell of the building and soundproofing of the roof between floors should be provided according to the 18th topic of the National Building Regulations.
    4. In different climatic conditions, the necessary arrangements should be considered in the design and implementation of buildings.
    5. It is necessary to make appropriate arrangements for different climatic conditions and corrosive environments of Iran.
    20. All materials and components in this system, including architecture and structure, in terms of durability, corrosion, environment, etc., should be used based on Iran’s national building regulations or recognized and approved national or international regulations. to be
  •  Hollow Core Slabs Criteria and Requirements 1) Roofs made of Hollow Core Slabs from types of regular reinforced concrete and pre-stressed reinforced concrete are known systems all over the world and are among semi-heavy roofs up to are considered heavy. 2) The use of this type of roof is allowed only in buildings with a reinforced concrete frame. 3) Gravity loading and vibrations of the resulting systems should be based on the latest edition of the sixth topic. Iran’s national building standards with the title of loads on buildings and Iran’s 2800 standard should be applied. 4) The design, construction and implementation of hollow core slabs of ordinary reinforced concrete type should be based on the latest edition of the PCI Design Manual (Manual for the Design of Hollow Core Slabs). While considering the criteria of the ninth topic of the National Building Regulations of Iran entitled Design and Implementation of Reinforced Concrete Buildings, it should be done. 5) Checking the rigidity of the diaphragm of hollow core roofs should be done based on paragraph 2-9 and Appendix No. 6 of Iran Standard 2800 and the preparations In order to ensure the integrity of the roof and its rigidity, it should be considered according to the criteria of the PCI guidelines. 6) Checking the rigidity of the diaphragm, in case of using top concrete, it is necessary to observe the thickness of at least 5 cm. It is necessary to connect the prefabricated roof panels to each other and implement beams around the roof openings as well as the implementation of the perimeter coils of the roof. or border elements, rebars in the form of hooks should be used. 9) The size limit of the openings should be observed based on the criteria of the ninth topic of the National Building Regulations of Iran, and in any case, it should not exceed one fifth of the length of the hollow core panel and one half of the width of the panel. 10) In irregular plans or in the case that the dimensions of the openings in the plan are larger than one-fifth of the length of the hollow cover panel or one-half of the width of the panel, it is necessary to implement a layer of concrete with a thickness of at least five centimeters. 11) Design criteria and The implementation of prestressed hollow core concrete roof system should be done based on ACI 318 regulations and prestressed concrete design and calculation regulations subject to publication 250 of the country’s management and planning organization, which is an additional part of Iran’s concrete regulations (ABA).12) It is mandatory to comply with the minimum consumption grade of concrete equivalent to C30 in prestressed reinforced concrete parts. 13) The guaranteed breaking strength of prestressing steel types as follows should be between 1200 and 2200 N/m be square meters:
    1. a. De-stressed bare wire
    2. b. De-stressed uncoated seven-wire strand or strands thereof
    3. c. High resistance steel rod without coating
    14) Controlling the tensile force of prestressing steel should be done by precisely calibrated jacks. 15) Prestressing hollow core slabs should be made by a trained expert team and requires strict quality control during construction. 16) Protection of prestressing steels in It is very important against rust and must be effectively protected, however, it is necessary to comply with the necessary measures according to different climatic conditions and corrosive environments of Iran. 17) All materials and components in this system, including architecture And the devices in terms of durability, environment, etc. should be used based on the national regulations of Iran’s construction or recognized and approved national or international regulations. 19) Complying with the third topic of Iran’s national building regulations, titled as the protection of buildings against fire, as well as the requirements of the publication number 444 of the Building and Housing Research Center related to the resistance of building components against fire, taking into account the dimensions of the building, its use and function. Functionality of building components is mandatory. 20) Airborne soundproofing and ceiling joists between floors should be provided according to the 18th topic of the National Building Regulations of Iran entitled Insulation and Sound Regulation. 21) If the set of rules, instructions or regulations regarding this system by this center be published Manufacturing companies, employers, consultants and contractors are required to comply with it.
  • CFS Cold Rolled Steel Light Frame Construction System
  •  
  • The components of the cold steel family (CFS) are made of structural steel sheets that are formed through a press of cut sheets or steel roll forming by a set of molds, for forming in this way, heat treatment is not required. unlike hot rolled steel) and therefore they are known as cold steel.
    The members of the cold steel family and its other products are thinner, lighter and easier to produce, and usually have lower costs than their counterparts produced by hot rolling. A range of different thicknesses of steel to meet structural and non-structural needs in are available
    Why choose CFS?
    In recent years, cold steel frames have attracted the attention of consumers for several reasons and have been able to allocate a share of the market. Actually, more than 50% of house building structures are CFS doors. There are several reasons to draw attention to cold steel frames. CFS frames for floors and interior walls are very compatible with engineered wood products and cement board.
    Multiple time studies have shown that the cost benefits for users with CFS experience are about 2-6% of the total building cost, depending on the type of house. Also, CFS has precise dimensional tolerances. And it is a suitable option for areas with problems of insects and termites. There is no reason that
    the resources available to help the designers have special cost facilities.
    CFS frames offer freedom in design solutions that will be more economical than using traditional frames. (In other words, more open space, longer beams and higher ceilings)
    Advantages of CFS frames 
    Some of the unique qualities of steel frames are:
    1- Abundance: members of the cold steel family are easily available by local distributors of suppliers and building materials. to be
    2- Price stability: The price of steel has been almost constant during the last two decades.
    3- Integrated quality: the steel does not have knots, twists or local defects. It is always accurate in terms of dimensions and produced under specified tolerances.
    Compliance with standards, CFS frames are under ICC, CABO, IBC, IRC standards, their non-flammability and high resistance allow them to be used in buildings up to 6 floors high.
    4-Flexibility in design: CFS family members are available in different sizes and enables the designer to meet his requirements for loads, under economic conditions and to achieve the length of long beams.
    5- Light weight: Listofer, the weight of the metal used in CFS is 40% less compared to the weight of conventional iron in hot rolling, which reduces the weight of the structure.
    6-Easy installation: the holes on these structures make it easier to install electrical, plumbing and mechanical lines.
    7-Less resilience: CFS frames are connected by screws, and this prevents the nails from falling back in the method of building wooden houses. deletes
    8- Similar appearance: After installing the final surfaces of the interior and exterior, CFS and steel buildings will not be distinguishable from each other.
    9- Non-flammability: steel is not flammable. It prevents the spread of fire and easily complies with flammability regulations.